DE102019116682A1 - End plate of a multi-plate clutch, assembly and method for manufacturing an assembly - Google Patents

Abstract

An end lamella (52, 54) of a lamellar clutch is described which has an annular disk, the annular disk having a central opening (13) and at least one axial indentation (56) on one end face, over which a corresponding projection (58 ) is formed.

Description

The invention relates to an end plate of a multi-plate clutch and an assembly of several end plates and a method for producing the assembly.

Disk packs, disk clutches, which also include disk brakes, are widespread in the prior art. They are used when rotating parts are to be connected to one another to transmit torque or to be separated from one another without torque. The torque is transmitted frictionally.

One usually speaks of a coupling when both parts to be connected can be rotated. A brake is usually used when one of the parts can be rotated and the other is stationary, whereby, for the sake of simplicity, a brake will also fall under the generic term “clutch” below.

Multi-plate clutches with plate packs are used in particular in the field of automatically shiftable vehicle transmissions. Here, one takes advantage of the fact that such clutches can transmit or hold large torques relative to the space required.

Such plate packs generally have an end plate and a plate carrier base or two end plates, between which several intermediate plates are arranged. The intermediate disks are, for example, steel or friction disks, each of which has a certain thickness tolerance. In the case of disk packs with a large number of intermediate disks, this results in a large spread of the disk pack length.

To maintain the maximum tolerance, tolerance compensation is often carried out using the end lamellas. The end lamellas are available in various thicknesses and are selected so that the lamella pack length is as close as possible to the nominal dimension. Usually a number of five to ten different thicknesses are required.

Alternatively, the end lamellas are either ground down from a uniform lamella thickness to different lamella thicknesses or there are sheets of different lamella thicknesses from which the end lamellas are made.

These variants cause high costs, such as B. process costs, storage, handling, set-up times or the like.

The object of the invention is to create a reliable and precise end lamella that can be manufactured easily and inexpensively.

This object is achieved according to the invention by an end plate of a multi-plate clutch which has an annular disc with a central opening and at least one axial indentation on one end face, a corresponding projection being formed over the axial indentation on the opposite end face.

By varying the depth of the embossments and corresponding projections, starting from always the same sheet metal wall thickness, a variable thickness of the end lamella can be realized. In addition, the number and positions of the impressions and corresponding protrusions can be adapted to the respective application. Another advantage is that all variants of an end lamella can be represented with an annular disk blank without having to carry out additional post-processing.

The end lamella can have a multi-tooth profile on the radially inner or radially outer circumferential edge (inner or outer lamella).

Optionally, the end plate, in particular on the at least one projection, can have a friction lining.

Depending on the requirements placed on the end lamella, the axial depth, shape and number of the indentation and, accordingly, the axial extent, shape and number of the associated projection can vary from end lamella to end lamella and be incorporated individually into the annular disk.

In one embodiment, it is possible for an indentation and an associated projection to run around the opening in a ring, in particular centrally to the central axis of the end lamella. As a result, a contact surface of the annular disk formed by an axial end face of the projection can be enlarged and the forces acting on the projections can thus be better distributed over the annular disk and vice versa.

Alternatively, a plurality of radially spaced, circumferential, annular impressions and associated projections are provided, which in particular run concentrically to one another. As a result, the contact surface of the annular disk can be increased even further.

Another embodiment provides that several circumferentially spaced apart Embossings and corresponding projections are provided.

In particular, the center points of all impressions lie on the same circumferential circumferential ring that is central to the center axis of the end lamella.

Alternatively, the center points of adjacent impressions can be positioned radially offset from one another at least around the circumference.

Optionally, the circumferential distance between the centers of adjacent embossings can vary.

According to one aspect, the indentations and their associated projections form circular areas or oval areas.

It is thus possible to adapt the end lamella individually to a wide variety of applications.

In particular, the oval surfaces are aligned with their respective longitudinal center axes at an angle to a straight straight line that intersects the longitudinal center axis. As a result, a contact surface of the annular disk formed by an axial end face of the projections can be enlarged.

In other words, an angle between the respective longitudinal center axis of the oval surfaces and the intersecting, radially extending straight line is greater than 0 ° and less than 90 °.

In particular, the angle is between 30 ° and 45 °.

Optionally, the angle is (essentially) identical for all oval surfaces.

Alternatively, the angle of at least one oval surface is different.

Another aspect provides that all projections define a planar outer surface, which lies in a common radial plane to the central axis of the end lamella. As a result, forces from the end lamella can be transmitted evenly to another component via the projections or vice versa.

The radial plane is parallel to a cross-sectional plane of the annular disk.

In other words, the radial plane always runs perpendicular to the central axis of the end lamella.

In particular, it is possible to provide different forms of impressions and associated projections on the annular disk.

Furthermore, the object is achieved by an assembly of several end lamellas, the end lamellas being made of sheet metal and all having the same sheet metal wall thickness, the axial extent of the projections being different in comparison to the end lamellas. The result is a modular system from which the correct end disks can be selected individually, depending on the disk pack thickness, in order to obtain the desired coupling dimensions.

The end lamellas thus have a sheet metal wall thickness and a lamella thickness induced by the axial extension of the projections, which is composed of the sheet metal wall thickness and the axial extension of the projections.

Accordingly, the end lamellae have a different lamella thickness from one another, only in that the axial extent of the projections is different in comparison to the end lamellae.

In particular, the end lamellas have the same geometries except for the different axial extent of the projections and the corresponding different axial depth of the embossments. The production effort can thus be reduced, since the corresponding production tools do not have to be set to different geometries of the end lamellae. In addition, the storage costs can be reduced, since no prefabricated ring disk blanks with different geometries have to be stored.

• Bereitstellen von Ringscheiben aus Blech, die allesamt gleiche Blechwanddicken und Außenabmessungen haben, und
• Herstellen von sich in ihrer axialen Lamellendicke unterscheidenden Endlamellen durch Erzeugen unterschiedlich tiefer Einprägungen und damit Vorsprünge, welche sich in ihrer axialen Erstreckung unterscheiden, mittels eines Umformwerkzeugs, insbesondere mittels immer demselben Umformwerkzeugs, welches unterschiedlich tief in die Endlamellen eindringt.

Furthermore, the object is achieved by a method for producing an assembly with the following steps:

• Provision of ring disks made of sheet metal, all of which have the same sheet metal wall thicknesses and external dimensions, and
• Manufacture of end lamellas that differ in their axial lamellar thickness by creating indentations of different depths and thus projections which differ in their axial extent by means of a forming tool, in particular by means of always the same forming tool which penetrates the end lamellae at different depths.

In particular, internal or external toothing can already be provided on the radially inner or radially outer peripheral edge of the annular disk before the production step of providing annular disks. In other words, the ring disk blanks have internal or external teeth.

Optionally, a production of internally or externally toothed ring disks before or after the production of end lamellas differing in their axial lamellar thickness.

By producing individually adapted axial depths of the embossments and thus individually adapted axial extensions of the projections per end lamella, subsequent grinding work is reduced or the grinding work is completely eliminated.

The described advantages and properties of the end lamella according to the invention apply equally to the assembly and the method for producing an assembly and vice versa.

• - 1a) eine Draufsicht auf ein Lamellenpaket nach dem Stand der Technik,
• - 1 b) einen Querschnitt des Lamellenpakets nach dem Stand der Technik,
• - 2a) eine Draufsicht auf ein erfindungsgemäßes Lamellenpaket,
• - 2b) einen Querschnitt des erfindungsgemäßen Lamellenpakets,
• - 3a) eine Draufsicht auf eine erste Ausführungsform einer erfindungsgemäßen Endlamelle,
• - 3b) einen Querschnitt der ersten Ausführungsform der erfindungsgemäßen Endlamelle,
• - 4 eine Draufsicht auf eine zweite Ausführungsform der erfindungsgemäßen Endlamelle,
• - 5a) eine Draufsicht auf eine dritte Ausführungsform der erfindungsgemäßen Endlamelle, und
• - 5b) einen Querschnitt der dritten Ausführungsform der erfindungsgemäßen Endlamelle.

Further advantages and properties of the invention emerge from the following description and the drawings, to which reference is made. In the drawings show:

• - 1a) a plan view of a disk pack according to the prior art,
• - 1 b) a cross-section of the plate pack according to the state of the art,
• - 2a) a plan view of a disk pack according to the invention,
• - 2 B) a cross section of the lamella set according to the invention,
• - 3a) a plan view of a first embodiment of an end lamella according to the invention,
• - 3b) a cross section of the first embodiment of the end lamella according to the invention,
• - 4th a plan view of a second embodiment of the end lamella according to the invention,
• - 5a) a plan view of a third embodiment of the end lamella according to the invention, and
• - 5b) a cross section of the third embodiment of the end lamella according to the invention.

In 1 is a plate pack 10 shown according to the prior art. Here is the plate pack 10 shown in a compressed state.

The lamella pack 10 includes several slats 12th , 14th , 16 , 18th , which are each designed as an annular disk and alternately an internal toothing 20th or external toothing 22nd exhibit. Lamella carriers are omitted for simplicity.

The various ring disks are axial, ie in a direction parallel to a central axis 11 , arranged one behind the other and each have an opening 13 on.

The two outermost slats 12th , 14th are called end lamellas 12th , 14th and have different toothings 20th , 22nd on.

One of the two end lamellas 12th , 14th can also be designed as, in particular, a flat plate carrier base, so that the plate pack 10 only one end lamella 12th , 14th includes.

The two end lamellas 12th , 14th can be made of the same material, such as sheet metal, or made of different materials.

The internally toothed end lamella 12th are several internally toothed intermediate plates 16 and the externally toothed end lamella 14th are several externally toothed intermediate plates 18th assigned.

The intermediate lamellas 16 , 18th are between the end lamellas 12th , 14th provided and can be designed, for example, as steel disks coated with friction material disks. There are intermediate plates with identical teeth 20th , 22nd made of the same material. The slats 16 form a group of lamellas just like the lamellas 18th .

The slats 16 a group of lamellas are opposite the lamellas 18th the other group of lamellas offset radially by B ₁ .

The lamellae are in the axial direction 16 a group of slats between two slats 18th the other group of lamellas arranged.

In the embodiment considered here, there are only the end lamellae 14th with its closest associated intermediate lamella 18th positioned directly next to each other.

The lamella pack 10 must have a predetermined total thickness D _LP exhibit. This total thickness D _LP can from disk pack 10 to disk pack 10 vary.

About tolerances of the individual intermediate plates 16 , 18th equalize and the predetermined total thickness D _LP must be adhered to with conventional lamella packs 10 , as in 1 , the end lamellas 12th , 14th each to a specific lamella thickness D _tbsp ground.

Alternatively, end lamellas are used 12th , 14th with certain lamella thicknesses created in advance D _tbsp in the disk pack 10 used.

To the manufacturing and storage costs of such end lamellas 12th , 14th to be reduced in a lamella pack 50 End lamellas 52 , 54 according to 2 used.

One of the two end lamellas can also be used here 52 , 54 be designed as, in particular flat, lamellar carrier bottom, so that the lamella pack 50 only one end lamella 52 , 54 includes. The two in 2 end lamellas shown 12th , 14th however, are intended to show that the special end lamella explained below can be an inner end lamella or an outer end lamella.

In 2 is the plate pack 50 shown in a compressed state. For the off 1 known features are used the same reference numerals, and reference is made to the above explanations.

In contrast to the plate pack 10 out 1 point the end lamellas 52 , 54 of the lamella pack 50 in each case on their intermediate lamellae 16 , 18th facing away from the outside 56 each to the intermediate lamellae 16 , 18th facing inside a projection 58 form.

Only the circular protrusions 58 lie in the compressed state of the plate pack 50 each with a frontal contact surface 60 on one of the intermediate plates 16 , 18th at.

The impressions 56 and associated protrusions 58 can be made into the end lamella using a forming tool 52 , 54 be incorporated. These can take various forms. Depending on the required lamella thickness D _tbsp or total thickness D _LP become end lamellas 52 , 54 with a required axial depth T _E of impressions 56 and corresponding axial extension Ev of the projections 58 used.

In 1 corresponds to the slat thickness D _tbsp the sheet metal wall thickness D _B of the end lamellas 12th , 14th . In the embodiment according to 2 corresponds to the slat thickness D _tbsp the sheet metal wall thickness D _B plus the depth T _E or axial extension Ev of the impressions 56 or the projections 58 .

The following are various embodiments of end lamellas 52 with differently shaped impressions 56 and protrusions 58 described.

In 3 is the first embodiment of the end lamella 52 according to 2 shown in a plan view and in cross section. 3 b) shows the imprint 56 and the associated protrusion 58 in detail.

The circular imprints 56 and the associated circular projections 58 are circumferentially centric in the end lamella 52 brought in. That means all imprints 56 and associated protrusions 58 (essentially) the same distance from the central axis 11 exhibit.

The circumferential distance between adjacent impressions 56 and protrusions 58 is the same in this embodiment.

A second embodiment of the end lamella 52 is in 4th shown.

In this embodiment the embossments have 56 and the associated protrusions 58 an oval shape.

The oval surfaces each have an oblique longitudinal center axis 62 on, the oblique to each one the longitudinal center axis 62 intersecting radial straight lines 64 are aligned.

An angle α between the longitudinal center axis 62 and the straight line 64 defines an orientation of the oval embossing 56 and associated protrusions 58 .

The angle is between 0 ° and 90 °, preferably between 30 ° and 45 °.

The cross section of the second embodiment of the end lamella 52 is similar to that of the first embodiment shown in FIG 3 b) .

5 Figure 3 shows a third embodiment of the end lamella 52 .

This is where the impressions run 56 and the associated protrusions 58 annular around the opening 13 the end lamella 52 , especially centric to the central axis 11 the end lamella 52 .

Specifically, the third embodiment has two radially spaced, circumferential, annular impressions 56 and associated protrusions 58 that are concentric to each other.

In all embodiments, the planar, face-side contact surfaces define 60 of all protrusions 58 an end lamella 52 , 54 a flat outer surface, all in a common radial plane to the central axis 11 the end lamella 52 , 54 lie.

The radial plane always runs perpendicular to the central axis.

In a process for making the end lamellas 52 , 54 In a first step, sheet-like ring disk blanks are provided, all of which have the same sheet metal wall thicknesses D _B and have external dimensions.

Optionally, these ring disc blanks can already have the internal or external toothing 20th or. 22nd exhibit.

Alternatively, the internal or external teeth 20th or. 22nd can only be attached to the washer in the following steps.

In a further step, the imprints 56 and the associated protrusions 58 incorporated into the annular disk blank by means of a forming tool, in particular always by means of the same forming tool.

Here are different impressions 56 and associated protrusions 58 with different depth T _E or extension Ev produced by the fact that the forming tool enters the end lamellae at different depths 52 , 54 penetrates. Thus, the end lamella thickness D _tbsp can be customized.

By making end lamellas 52 , 54 with impressions of different depths 56 and axially protruding protrusions 58 An assembly in the form of a construction kit is created from the same sheet metal, which allows the optimally thick end lamella to be produced 52 , 54 to be assigned to a disk pack.

Claims (10)

End plate of a multi-plate clutch, the end plate (52, 54) having an annular disk which has a central opening (13) and at least one axial indentation (56) on one end face, over which a corresponding projection (58) is formed on the opposite end face . End lamella after Claim 1 , characterized in that an indentation (56) and an associated projection (58) run in a ring around the opening (13), in particular centrally to the central axis (11) of the end lamella (52, 54). End lamella after Claim 2 , characterized in that a plurality of radially spaced, circumferential, annular embossments (56) and associated projections (58) are provided, in particular wherein the embossments (56) run concentrically to one another. End lamella according to one of the preceding claims, characterized in that several circumferentially spaced apart impressions (56) and corresponding projections (58) are provided. End lamella after Claim 4 , characterized in that the impressions (56) and their associated projections (58) form circular areas or oval areas. End lamella after Claim 5 , characterized in that the oval surfaces are aligned with their respective longitudinal center axis (62) obliquely to a respective radial straight line (64) which intersects the longitudinal center axis (62). End lamella according to one of the preceding claims, characterized in that all the projections (58) define a planar outer surface which lies in a radial plane to the central axis (11) of the end lamella (52, 54). Assembly of several end lamellas (52, 54) according to one of the preceding claims, wherein the end lamellas (52, 54) are made of sheet metal and all have the same sheet metal wall thickness (D _B ), the axial extent (Ev) of the projections (58) in comparison the end lamellas (52, 54) are different from one another. Assembly according to Claim 8 , characterized in that the end lamellae (52, 54) have the same geometries except for the different axial extent (Ev) of the projections (58) and the corresponding different axial depth (T _E ) of the embossments (56). Method for manufacturing an assembly according to Claim 8 or 9 , characterized by the following steps: providing ring discs made of sheet metal, all of which have the same sheet metal wall thicknesses (D _B ) and external dimensions, and producing end lamellas (52, 54) that differ in their axial lamellar thickness (D _EL ) by creating impressions (56 ) and thus projections (58), which differ in their axial extent (Ev), by means of a forming tool, in particular always by means of the same forming tool, which penetrates the end lamellae (52, 54) to different depths.

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